Number of distinct solutions of sum{i=1..9}(x(2i-1)*x(2i)) = 0 (mod n), with x() only in 2..n-2.

A180821

Number of distinct solutions of sum{i=1..9}(x(2i-1)*x(2i)) = 0 (mod n), with x() only in 2..n-2.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =11a(5) =409a(6) =6946a(7) =108997a(8) =1113650a(9) =9684748a(10) =64448228a(11) =375427744a(12) =1820591506a(13) =7980182839a(14) =30660616489a(15) =109065451832a(16) =351179673979

External references